We observed non-Gaussian statistics for power grid frequency fluctuations in the histograms of the aggregated data (Figs. REF  and REF ).
To anticipate the risks due to large frequency excursions, we require a stochastic theory that links power fluctuations with frequency fluctuations. This would allow us to anticipate the magnitude of fluctuations when designing a new system, such as a microgrid or smart grid. We will briefly review some corner stones of the results recently obtained in [1]} on this question.
